Data writing method, device, storage server, and computer readable storage medium

Abstract

This application discloses a data writing method, device, a storage server and a computer readable storage medium, including: writing, when a write request is received, write data corresponding to the write request to a write buffer; acquiring historical access data of a data block corresponding to to-be-flushed data in the write buffer when a data flushing operation is triggered for the write buffer; determining whether the to-be-flushed data is write-only data based on the historical access data by using a pre-trained classifier; if yes, writing the to-be-flushed data to a hard disk drive; and if no, writing the to-be-flushed data to a cache. The data writing method provided by this application can effectively reduce the traffic of writing dirty data to the cache while reserving more space in the cache for the ordinary data, thereby improving the utilization of the cache space and the read hit rate of the cache.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation application of PCT Patent Application No. PCT / CN2020 / 119881, entitled “DATA WRITING METHOD AND APPARATUS, AND STORAGE SERVER AND COMPUTER-READABLE STORAGE MEDIUM” filed on Oct. 9, 2020, which claims priority to Chinese Patent Application No. 201911304631.1, filed with the State Intellectual Property Office of the People's Republic of China on Dec. 17, 2019, and entitled “DATA WRITING METHOD, DEVICE, STORAGE SERVER, AND COMPUTER READABLE STORAGE MEDIUM”, all of which are incorporated herein by reference in their entirety.FIELD OF THE TECHNOLOGY[0002]This application relates to the field of storage technologies, and specifically, to a data writing technology.BACKGROUND OF THE DISCLOSURE[0003]When a client generates a write request, a storage server determines whether to load to-be-written data to a cache and when to flush dirty data in the cache to a back-end hard disk drive according to a write policy. Th...

AI Technical Summary

Benefits of technology

The patent application provides a method to improve the efficiency of writing data to a cache by separating write-only data from ordinary data. By determining the type of data to be flushed, the method reduces unnecessary traffic to the cache and improves the utilization of cache space, ultimately improving read performance. The application also provides a data writing device, storage server, and computer storage medium that support this method.

Problems solved by technology

In ever-changing and diverse cloud workloads, a fixed write policy is bound to be inefficient.

Therefore, how to raise the efficiency of write policies is a technical problem to be solved by a person skilled in the art.

Considering that write-only data is only for write operations within a certain time window and not for read operations, loading the write-only data to the cache not only will not increase a read hit rate of the cache, but will also cause a large amount of unnecessary write traffic to the cache.

Images